General

Yongsheng Xu
Institute of Oceanology, Chinese Academy of Sciences
Email: yongsheng.xu@qdio.ac.cn 

yongsheng.xu@alumni.caltech.edu

Telephone: 0532-82898352
Address: 7 Nanhai Road, Qingdao, Shandong ,P.R.China
Postcode: 266071

Research Areas

Satellite oceanography
Ocean remote sensing
Ocean dynamics

Education

Ph.D. in Physical Oceanography, 2006, Graduate School of Oceanography, 
University of Rhode Island, Kingston, USA
M.S. in Physics (Optics), 1997, Fudan University, Shanghai, China
​A.S. in Electrical Engineering, 1990, Ocean University of China, Qingdao, China

Experience

Caltech Postdoctoral Scholar, 2009-present, NASA Jet Propulsion Laboratory California Institute of Technology
Postdoctoral Research Associate, 2008-2009, University of South Florida
Postdoctoral Fellow, 2006-2008, University of Texas at Austin
Ph.D. Candidate, 2001-2006, Graduate School of Oceanography, University of Rhode Island
​Assistant Scientist, 1997-2001, The First Institute of Oceanography, SOA,Qingdao, China.

Honors & Distinctions

Caltech Scholar, 2009, California Institute of Technology

Alumni Fellowship, 2006, GSO, University of Rhode Island.

​URI President Travel Award, 2006, University of Rhode Island.

Publications

    1. Yang,L., Xu, Y*.,Jiang,Y.,S. P. Mertikas, Wang,Z.,Zhu, L.,Liu,N.,Lin,L.Retrieval of Ocean Wave Characteristics via Single-Frequency Time-Differenced Carrier Phases From GNSS Buoys.IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING.2024,62.

      Related reports：http://qdio.cas.cn/2019Ver/News/kyjz/202404/t20240402_7067782.html

    2. He,J.,Xu, Y*.,Sun, H.,Jiang,Q.,Yang,L.,Kong,W. ,Liu,Y.Sea Surface Height Wavenumber Spectrum from Airborne Interferometric Radar Altimeter.Remote Sens. 2024, 16.Related reports：http://qdio.cas.cn/2019Ver/News/kyjz/202404/t20240417_7114566.html

    3. Yue,W., Xu, Y*., Xiang, L., Zhu,S., Huang,C., Zhang,Q.,Zhang,L., and Zhang,X.Prediction of 3-D Ocean Temperature Based on Self-Attention and Predictive RNN.IEEE Geoscience and Remote Sensing Letters.2024

    4. Xiang, L.,Xu, Y*.,Sun, H., Zhang, Q., Zhang, L., Zhang, L., Zhang, X., Huang, C., Zhao, D. Retrieval of Subsurface Velocities in the Southern Ocean from Satellite Observations. Remote Sens. 2023, 15, 5699. https://doi.org/10.3390/rs15245699

    5. Yang,L., Liu,M., Liu, N., Guo,J., Lin,LA ., Zhang,Y.,Du,X., Xu, Y ., Zhu, C.,Wang, Y.Recovering Bathymetry From Satellite Altimetry-Derived Gravity by Fully Connected Deep Neural Network.IEEE GEOSCIENCE AND REMOTE SENSING LETTERS.2023,20,DOI:10.1109/LGRS.2023.3302992.

    6. Liu,X., Kong,W. ,Sun,H.* , Xu, Y .,Lu,Y.An Improved Altimeter in-Orbit Range Noise-Level Estimation Approach Based on Along-Track Differential Method.Remote Sens. 2022, 14(24), 6250.

    7. Yang, L. , Xu, Y*.,Lin,M., Ma,C., S. P. Mertikas, Hu,W., Wang,Z., Mu,B., Zhou,X.Monitoring the Performance of HY-2B and Jason-2/3 Sea Surface Height viathe China Altimetry Calibration Cooperation Plan, IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING (TGRS).2022 , Doi: 10.1109/TGRS.2022.3153631.

    8. Zhu, L., Yang, L.,Xu, Y ., Zhang, H., Wu, Z.,Wang, Z .Independent Validation of Jason-2/3 and HY-2B Microwave Radiometers Using China Coastal GNSS.IEEE Transactions on Geoscience and Remote Sensing.2022.DOI10.1109/TGRS.2021.3106650

    9. Liu,Y.,Xu, Y*.The energy and enstrophy cascades in the geostrophic vortex with slowly varying inertia-gravity wave spirals.Physics of Fluids.2021,DOI: 10.1063/5.0062814.    相关报道：http://www.qdio.cas.cn/2019Ver/News/kyjz/202109/t20210927_6215544.html

    10. Jiang,Q.,Xu,Y+,*. ,Sun,H. ,Wei,L. ,Yang,L. ,Zheng,Q. ,Jiang,H. ,Zhang,X. ,Qian,C. Wind-Generated Gravity Waves Retrieval From High-Resolution 2-D Maps of Sea Surface Elevation by Airborne Interferometric Altimeter. IEEE Geoscience and Remote Sensing Letters.2022, doi: 10.1109/LGRS.2021.3088516.

      相关报道：http://www.qdio.cas.cn/2019Ver/News/kyjz/202106/t20210630_6121796.html

    11. Li, H.,Xu,Y+,*.Barotropic and baroclinic inverse kinetic energy cascade in the Antarctic.J. Phys. Oceanogr: 2021,51.

      相关报道：http://www.cas.cn/syky/202102/t20210224_4778586.shtml?from=singlemessage

    12. Zhao, D. , Xu, Y+,* .,  Huang, C., Zhang, X.Global chlorophyll distribution induced by mesoscale eddies. Remote Sensing of Environment: 2021,254.

      相关报道：http://www.qnlm.ac/page?a=5&b=2&c=261&d=1&p=detail

    13. Yang, L. , Xu, Y+.,  Zhou,X.,  Zhu, L.,  Jiang,Q. ,  Sun,H.,Chen,G.,  Wang ,P.,  Stelios P. Mertikas,  Fu,Y.,  Tang,Q.,  Yu,F.* Calibration of an Airborne Interferometric Radar Altimeter over the Qingdao Coast Sea, China. Remote Sens:  2020, 12, 1651 
    14. Hu,D. , Xu, Y*. A New Method of De-Aliasing Large-Scale High-Frequency Barotropic Signals in the Mediterranean Sea. Remote sensing: 2020, 13, 2157
    15. Zhao, D., Gao ,L., Xu, Y*. Quantification of the impact of environmental factors on chlorophyll in the open ocean.  J. Ocean. Limnol:   2020,7120
    16. Huang, C.,Xu, Y*.Update on the Global Energy Dissipation Rate of Deep-Ocean Low-Frequency Flows by Bottom Boundary Layer.. J. Phys. Oceanogr: 2018 ,48 ,1243-1255 
    17. Huang, C., Xu, Y*.Spatial and seasonal variability of global ocean diapycnal transport inferred from Argo profiles. Journal of Oceanology and Limnology: 2018 
    18. Ma, J., Xu, Y*.Using multisatellite altimetry estimate energy fluxes in South China Sea. Journal of Oceanology and Limnology: 2018 
    19. Hong, L.,Xu, Y*.Improving mesoscale observations from Satellite altimetry using pressure and tide gauge measurements in the Japan Sea. International Journal of Remote Sensing: 2017 ,38(22) ,6247-6267 
    20. Xu, Y*., Gao, L., Zhang, Y.New generation altimetry satellite SWOT and its reference to Chinas swath altimetry satellite. Remote Sensing Technology and Application, CSCD: 2017 ,32(1) ,79-89 ,79-89
    21. Hui, Z.,Xu, Y*.The impact of wave-induced Coriolis-Stokes forcing on satellite-derived Ocean Surface Currents J. Geophys. Res. Oceans: 2016 ,121(1) ,88-97 
    22. Liu, C.,Xu, Y*.Quantification and Evaluation of the PDO Influence on North Pacific SLR during 1950-2010 marine science: 2017 ,41(4) ,410-426 
    23. Ge, L.,Xu, Y*.Comparison of sea surface height anomalies derived by pressure-sensor-equipped inverted echo sounders and satellite altimetry in the Southwest Marine Sciences: 2016 ,40(2) ,128-135 
    24. Yang, T.,Xu, Y*.Estimation of the time series of the meridional heat transport across 15{degree sign}N in the Pacific Ocean from Argo and satellite data J. Geophys. Res. Oceans: 2015 ,120(4) ,3043-3060 
    25. Li,Y.,Xu, Y*.Penetration depth of diapycnal mixing generated by wind stress and flow over topography in the northwestern Pacific J. Geophys. Res. Oceans: 2014 ,119 ,5501-5514 
    26. Liu, H., Zhang, Q., Duan, Xu, Y*.Numerical Study on the Mechanism of Seasonal Variation of Meridional Overturning Circulation in the North Pacific. Advances in Marine Science: 2016 ,34(3) ,347-357 
    27. Li, H.,Xu, Y*. Seasonal variability of eddy kinetic energy spectra and its mechanism in the north pacific subtropical countercurrentOceanologia et limnlologia sinica: 2017 ,48(5) ,932-943 
    28. Li, Y.,Xu, Y*. The study of ocean warming trend based on sealevel change in 2002-2014 Oceanologia et limnlologia sinica: 2017 ,48(4) ,712-720 
    29. Liu, H., Zhang, Q.,Xu, Y*.Numerical study on the interannual variation of the North Pacific Meridional Overturning Circulation, Duan, Y.. Journal of Applied Oceanography: 2016 ,35(3) ,329-338 
    30. Liu, H., Zhang, Q., Duan, Xu, Y*.A numerical study on the interannual variation of the North Pacific Meridional Overturning Circulation. Marine Sciences: 2016 ,40(1) ,155-160 
    31. Liu, S.,Jia, Y.,Qi , Z.,Wei*. E. Brightness Temperature Model of Sea Foam Layer at L-band. Chinese Journal of Oceanology and Limnology: 2015 ,14(1),38-46 
    32. Si, Z.,Xu, Y*.Influence of the Pacific Decadal Oscillati on Regional Sea Level Rise in the Pacific Ocean from 1993 to 2012 Chinese Journal of Oceanology and Limnology: 2014 ,32(6) ,1414-1420 
    33. Zhang, X.,Xu, Y*.Design and Implementation of Adaptive Noise Canceler Based on RLS Algorithm Recent Advances in Mathematical and Computational Methods: 2015 
    34. Zhang, X.,Xu, Y*.A New Method of CDOM Absorption in China East Coastal Waters Recent Researches in Applied Informatics: 2015 
    35. Zhang, X., Zheng, Z., I. Asanuma,Xu, Y*.A new kind of hybrid filter based on the intersecting cortical model and the improved Extremum-and-Median filter Artificial Life and Robotics: 2014 ,19（2） ,115-119 
    36. Zhang, X., Zheng, Z., I. Asanuma2,Xu, Y*. A New Kind of Super-Resolution Reconstruction Algorithm Based on the ICM and the Constrained Cubic Spline Interpolation Information -An International Interdisciplinary Journal: 2013,16(11) ,8027-8036 
    37. Yan, X., Li, Y., Xu, Y*.Analysis of temporal-spatial variations of urbulent diapycnal mixing in the northwestern Pacific Oceanologia et Limnologia Sinica: 2014 ,45(6) ,1148-1157 
    38. Xu, Z., Yin ,B., Hou ,Y.,Xu, Y.Variability of internal tides and near-inertial waves on the continental slope of the northwestern South China Sea JOURNAL OF GEOPHYSICAL RESEARCH: 2013 ,118,197-211 
    39. Xu, Y.,L-L Fu. The effects of altimeter instrument noise on the estimation of the wavenumber spectrum of sea surface height  J. Phys. Oceanogr: 2012 ,42 ,2229-2233 
    40. Xu, Y., L-L Fu, and R. Tulloch. The global characteristics of wavenumber spectrum of ocean surface wind J. Phys. Oceanogr: 2011 ,41 ,1576-1582 
    41. Xu, Y., L-L Fu.Global variability of the wavenumber spectrum of oceanic mesoscale turbulence J. Phys. Oceanogr: 2011 ,41 ,802-809 
    42. Xu, Y., Z-L. Yang.A method to study the impact of climate change on variability of river flow: an example from the Guadalupe River in Texas Climatic Change: 2012 ,113 ,956-976
    43. Xu, Y., D.R. Watts,  J.H. Park. J. Atmos.De-Aliasing of Large-Scale High-Frequency Barotropic Signals from Satellite Altimetry in the Japan/East Sea  Oceanic Technol: 2008 ,25 ,1703-1709 
    44. Xu, Y., J. Li,  S. Dong.Ocean circulation from satellite altimetry: progresses and challenges, in Ocean Circulation and El Nino Nova Science Publishers: 2009 
    45. Xu, Y.. VDM Publishing,Sea level variability from satellite altimetry and field measurements Inc., Saarbrucken: 2010

    46. Xu Y , Scott R B .Subtleties in forcing eddy resolving ocean models with satellite wind data Ocean Modeling: 2008 ,20 ,240-251 

    47. Xu, Y., D. R. Watts, M. Wimbush,  J.-H. Park.Fundamental-mode basin oscillations in the Japan/East Sea   Geophys. Res. Lett: 2007 ,34 ,L04605
    48. Xu, Y., D. R. Watts,  M. Wimbush.Coupled patterns between fields of dynamic height and bottom pressure in the Japan/East Sea Ocean Science Journal: 2009 ,44 ,35-42 
    49. Scott, R.B., Y. Xu.An update on the wind power input to the surface geostrophic flow of the World Ocean Deep-Sea Res. I: 2009 ,50 ,295-304 
    50. Xu, Y., Pan, J., Yu, Y. ,Zhao, Z.The Methods for Atmospheric Water Range Corrections and Their Effects on the Altimeter Data Appl ication. Journal of Oceanography of Huanghai & Bohai Seas: 2000 ,18(3) ,01-06
    51. Xu, Y., K. Han, J.H., Xu, G.P. Zhou, X.Z. Lu.Studies on Azimuthal Orientation of Hemicyanine Molecules in LB Films Acta Physico-Chimica Sinica: 1996 ,12 ,836-840
    52. Kiu, H, Y. XU, S.H. Ma, W.C Wang, L.G, Luo, X.Z, Lu.Studies on Optical Nolinear Anisotropy in Hemicyanine LB Multilayers Acta Physico-Chimica Sinica: 1996 ,12 ,589-593
    53. Lu, X.Z., K. Han, Xu, Y*., S.H. Ma, W.C Wang.Dipping induced in-plane molecular alignment of LB films Mol. Cryst. Liq. Cryst.: 1997 ,294 ,23-26
    54. Lu, X., K. Han, G-P, Zhou, Xu, Y., J.H. Xu, Z-M Zang.Flow dichroism in Langmuir-Blodgett multilayers Proc. SPIE: 1997 ,43 
    55. Xu, Y., X.Z. Lu, K. Han, J.H. Xu.Effect of chromophore interaction on optical nonlinearity in Langmuir-Blodgett Films Acta Optica Sinica: 1998 ,18 ,1025-1029
    56. Xia, D.Y., Z.X. Wang, S.K. Zhang., H.Y. Xin, Xu, Y. A development study of a portable instrument for measuring oil in seawaterJ. Oceanogr. Bohai and Huanghai Seas.: ,16 ,28-34
    57. Xia, D.Y., Z.X. Wang, L. Bin, S.K. Zhang., H.Y. Xin, Xu, Y. Experimental study on fluorimetry for measuring oil in seawaterOceanologia et Limnologia Sinica: 1999 ,30,104-109
    58. Xu, Y., K.L. Tracey, D.R. Watts, M. Wimbush, and W. Teague.Current Meter Data Report: Ulleung Basin in the Japan / East Sea GSO Technical Report: 2003 ,2003-02
    59. Mitchell, D.A., Xu, Y., K.L. Tracy, D.R. Watts, M. Wimbush. PIES Data Report: Ulleung Basin in the Japan/East SeaGSO Technical Report: 2004 
    60. Park, J.-H., D.R. Watts, M. Wimbush, J.W. Book, K.L. Tracey and Xu, Y.Rapid variability and its links to mesoscale circulation in the Japan/East Sea: basin oscillations, internal tides, and near-inertial oscillations Oceanography: 2006 ,19 ,76-85


Research activities

FIELD EXPERIENCE

RV Endeavor, September 2005, Chief Scientist: H. Thomas Rossby
Duty: analysis of velocity, CTD, acoustic measurements; contributed to the data report writing
RV Endeavor, November 2004, Chief Scientist: Dave Ullman
Duty: CTD team + determination of nutrients and oxygen, analysis of TS fields.

PROFESSIONAL ACTIVITIES

Reviewer for two proposals submitted to Climate Data Record (CDR) Program of NOAA’s National Climatic Data Center.
Journal Review: Journal of Atmospheric and Oceanic Technique, Water Resources Research, and Climatic Change.
Section Chairman, Numerical and Laboratory Models and Theory I, 2007 AGU Spring Meeting, Acapulco, Mexico.
Members: American Geophysical Union, American Meteorological Society.

OUTREACH

Judge chair of Earth/Space Sciences category, 61st Los Angeles County Science Fair, April 15, 2011.
Organizer of Ocean Science Element Meeting on 11:00 am Wednesday at NASA Jet Propulsion Laboratory, 2011.
Organizer of Caltech/JPL Ocean and Cryosphere Seminar, 2010.
​Member of Education Policy Committee of University of Rhode Island, 2005-2006.

Students

已指导学生

李颖  博士研究生  070701-物理海洋学  

杨婷婷  博士研究生  070701-物理海洋学  

刘超  硕士研究生  070701-物理海洋学  

李亚姣  硕士研究生  070701-物理海洋学  

黄超  博士研究生  070701-物理海洋学  

回贞立  博士研究生  070701-物理海洋学  

马静怡  硕士研究生  070701-物理海洋学  

赵丹丹  博士研究生  070701-物理海洋学  

李宏杰  博士研究生  070701-物理海洋学  

胡登辉  博士研究生  070701-物理海洋学  

姜秋富  博士研究生  070701-物理海洋学  

邢霄波  硕士研究生  085229-环境工程  

刘英和  博士研究生  070701-物理海洋学  

赵裕慧  硕士研究生  070701-物理海洋学  

现指导学生

向亮  博士研究生  070701-物理海洋学  

常天翔  硕士研究生  085700-资源与环境  

穆玉蓉  博士研究生  070701-物理海洋学  

杨磊  博士研究生  070701-物理海洋学  

曹赛超  博士研究生  070701-物理海洋学  

郭平  博士研究生  070701-物理海洋学